#pragma once
#include <wait.h>
#include "InetAddr.hpp"
#include "Log.hpp"
#include "ThreadPool.hpp"

using namespace LogModule;
using namespace ThreadPoolModule;
using task_t = std::function<std::string(const std::string&, InetAddr& addr)>;

const static int defaultsockfd = -1;
const static int backlog = 8;

class TcpServer : NoCopy
{
public:
    TcpServer(uint16_t port, task_t func)
    :_port(port), 
    _listensockfd(defaultsockfd), 
    _isrunning(false),
    _func(func)
    {}

    void Init()
    {
        _listensockfd = socket(AF_INET, SOCK_STREAM, 0);
        if(_listensockfd < 0)
        {
            LOG(LogLevel::FATAL) << "socket fail";
            exit(SOCKET_ERR);
        }
        LOG(LogLevel::INFO) << "socket success: " << _listensockfd;

        InetAddr local(_port);
        int n = bind(_listensockfd, local.NetAddrPtr(), local.NetAddrLen());
        if(n < 0)
        {
            LOG(LogLevel::FATAL) << "bind error";
            exit(BIND_ERR);
        }
        LOG(LogLevel::INFO) << "bind success" << _listensockfd;

        n = listen(_listensockfd, backlog);
        if(n < 0)
        {
            LOG(LogLevel::FATAL) << "listen error";
            exit(LISTEN_ERR);
        }
        LOG(LogLevel::INFO) << "listen success: " << _listensockfd;
    }

    void Service(int sockfd, InetAddr& peer)
    {
        char buffer[1024];
        while(true)
        {
            ssize_t n = read(sockfd, buffer, sizeof(buffer) - 1);
            if(n > 0)
            {
                buffer[n] = 0;
                LOG(LogLevel::DEBUG) << peer.StringAddr() << " Say# " << buffer;

                std::string echo_string = _func(buffer, peer);
                // std::string echo_string = "echo# ";
                // echo_string += buffer;
                write(sockfd, echo_string.c_str(), echo_string.size());
            }
            else if(n == 0)
            {
                LOG(LogLevel::DEBUG) << peer.StringAddr() << " 退出了...";
                close(sockfd);
                break;
            }
            else
            {
                LOG(LogLevel::DEBUG) << peer.StringAddr() << " 异常...";
                close(sockfd);
                break;
            }
        }
    }

    static void *Routine(void* args)
    {
        pthread_detach(pthread_self());
        ThreadData *td = static_cast<ThreadData*>(args);
        td->tsvr->Service(td->sockfd, td->addr);
        delete td;
        return nullptr;
    }

    class ThreadData
    {
    public:
        ThreadData(int fd, InetAddr& ar, TcpServer *s): sockfd(fd), addr(ar), tsvr(s){}
        int sockfd;
        InetAddr addr;
        TcpServer *tsvr;
    };

    void Run()
    {
        _isrunning = true;
        while(_isrunning)
        {
            struct sockaddr_in peer;
            socklen_t len = sizeof(sockaddr_in);
            int sockfd = accept(_listensockfd, CONV(peer), &len);
            if(sockfd < 0)
            {
                LOG(LogLevel::WARNING) << "accept error";
                continue;
            }
            InetAddr addr(peer);
            LOG(LogLevel::INFO) << "accept success, peer addr : " << addr.StringAddr();

            //多进程
            // pid_t id = fork();
            // if(id < 0)
            // {
            //     LOG(LogLevel::FATAL) << "fork error";
            //     exit(FORK_ERR);
            // }
            // else if(id == 0)
            // {
            //     //子进程
            //     close(_listensockfd);
            //     if(fork() > 0)
            //     {
            //         exit(OK);
            //     }

            //     Service(sockfd, addr);
            //     exit(OK);
            // }
            // else
            // {
            //     //父进程
            //     close(sockfd);
            //     pid_t rid = waitpid(id, nullptr, 0);
            // }


            //多线程
            ThreadData *td = new ThreadData(sockfd, addr, this);
            pthread_t tid;
            pthread_create(&tid, nullptr, Routine, td);

            //线程池
            // ThreadPool<task_t>::GetInstance()->Enqueue([this, sockfd, &addr](){
            //     this->Service(sockfd, addr);
            // });
        }
        _isrunning = false;
    }

    ~TcpServer()
    {}
private:
    uint16_t _port;
    int _listensockfd;
    bool _isrunning;
    task_t _func;
};